Grate



Febo .16 1926.'

l F. DE GRUcHY GRATE Filed May 10' 1924 WITNESS:

.a citizen of United States, residin Patented eb.' 16,

,- UNITED.A STATES PATENT oFF-ies.

FRANCIS DE GBUCHY F NEWARK; NEW JBSEY.

GBA'EE.

Application flledlay 10,v 1924. Serial No. 712,386.

To all wiwm may concern.' Be it known that I, FRANCIS DE GRUCHY, at

Newark, in the county of Essex and tate 'of New Jersey, have invented new and useful the provision `of'a grate consisting of a plurality 'of identical grate sections arranged side by side and co-acting with each other to'form air pockets beneath the upper surfaces thereof, there being openings .provided between the grate sections and grooves communicating with the openings to spread the draft of air from the air pockets when passing through the openings to assure a ycomplete consumption of the fuel carried` -upon the up er surface of the grate sections.

Another o ject of' the invention resides in the provision of a grate section which is cast 1n a single piece and wherein arelative- `ly small openingis' formed between the 4grate sections when vthe same are in assembled position to permit the burning of fine coal without fear of the coal passing through the openings on the supporting grate bar.

With these and other objects in view, thel invention resides in certain novel construc- 'tion and combination and arrangement of parts, the essential features, of which are hereinafter fully described, are particularly pointed out in the appended claim, and are illustratedA in the accompanying drawing, in which Figure 1 is a side elevation of my improved grate section applied to the grate bar of a Stoker.

Figure 2 is a perspective view of a plurality of rate sections arranged inassembled positlon.'

`Figure 3 is a transverse sectional vigew on the line 3-3 of Figure 1. 4

vFigure 4 is a transverse sectional view of one of the grate sections per se. v

Referringl more particularly tothe drawing, the reference numeral 10 designatesl the grate bar of a Stoker grate, and 11a dovetail track bolted or otherwise removably se'` cured to the grate bar 10 as at 12.' My im" 14'and a central longitudinal web 15 which extends the len hof the head. The web 15 is-provided with bosses 16 extending from opposite sides thereof and which bosses terminate in vertical aligmnent with the. sides 0f the head 14: The bosses 16 are formed. with transverse grooves 17 of a shape to be slidably received on the track 11. The grate sections are applied to the track by passing the same onto the track at one end thereof -and sliding them to their proper position.

Each grate section at one end thereof is formed with a lip 18, and a shoulder 19 which is disposed above the lip, and has its other end cut as at 20 for co-action with the shoulder 19 ofthe -next following grate section. The lips are adapted to prevent ashes from passing between the grate sections and falling onto the grate bars when the sections pass over the usual sprockets at the ends of the Stoker. The side edges of each grate section are provided with vertical semi-circular slots 21, the slots on c'ie edge being arranged diametrically opposite to the slots on the other edge, and each slot is flared Vat its top and bottom as at 22 and 23 respectively. Inclined grooves 24 communicate with the flared walls 22 and which next adjacent section to provide a complete' aperture or opening 25. When in this position, the webs 15 of the sections co-act to vform the walls of air ducts 26 for trapping the force of draft from the air blast usually employed in connection with Stoker grates and which is usually disposed below the grate bars. It will be seen .that fine coal resting upon the upper surface of the grate sections will be' completdly p consumed or burned by reason of the air assing through grooves terminate short 'of the longitudinal the restricted portion of t e openings 25,

from the led and t enl passing transversely toward the longitudinal center. of the head through the inclined grooves 24. The air fromthe grooves 24 of one side of the head meets the air from the. grooves ldiametrically opposite at .approximately the center of the pockets 26 where the air is collectl head to assure a proper distribution of the draft over the grate surface. The air passing out of the flared portions 22 meets at the transverse center between longitudinal rows of openings and affords a complete consumption at these points. From the description it will be manifest that a relatively line fuel may be used in connection with a grate made up of grate sections such as have been described, as the air is first trapped in the pockets beneath the upper surface of the grate, it is then passed through the restricted openings under a relatively high pressure sufficiently to prevent the 'coal from passing through the opening.

Vhile I have described what I deem to be the most desirable embodiment of my invention, it is -obvious that many of the detailsmay be varied without in any Way departing from the spirit of my invention, and I. therefore do not limit myself to thel exact details of construction herein set forth nor to anything less than the whole of my invention limited only by the appended claim. y

signature.

W'hat is claimed as new is In combination with the grate bar of a Stoker grate, a plurality of grate sections arranged side by side, means for removably securing said sections to said grate bar, each grate sedtion including a head and a, longitudinal web depending centrally the web of one grate section co-acting with the web of the next adjacent grate section to define pockets, vertical slots diametrically arranged on the side faces of said head, the u' per and lower walls of said slots being bevel ed in opposite directions the slots of one grate section co-acting'with the slots of the next adjacent grate sections to define openings in communication with said pockets and the upper surface of the grate sections, and grooves formed in the upper face of the therefrom,

head and leading from the upper bevelled walls of said slots toward the center but ter minating short thereof substantially as and for the purpose specified.

In testimony whereof I have aliixed my FRANCIS DE GRUoHY. 

